/**
 * 功能: [把1000 转化为 壹仟元整]
 * @author
 * @Datatime 2016-07-06
 * @param    {[num]}   currencyDigits [需要转化的数字]
 * @return   {[string]  outputCharacters}   [转化后的金额]
 */
function convertCurrency(currencyDigits) {
    // console.log(currencyDigits);
    
    var MAXIMUM_NUMBER = 99999999999.99;  //最大值
    // 定义转移字符
    var CN_ZERO = "零";
    var CN_ONE = "壹";
    var CN_TWO = "贰";
    var CN_THREE = "叁";
    var CN_FOUR = "肆";
    var CN_FIVE = "伍";
    var CN_SIX = "陆";
    var CN_SEVEN = "柒";
    var CN_EIGHT = "捌";
    var CN_NINE = "玖";
    var CN_TEN = "拾";
    var CN_HUNDRED = "佰";
    var CN_THOUSAND = "仟";
    var CN_TEN_THOUSAND = "万";
    var CN_HUNDRED_MILLION = "亿";
    var CN_DOLLAR = "元";
    var CN_TEN_CENT = "角";
    var CN_CENT = "分";
    var CN_INTEGER = "整";
 
    // 初始化验证:
    var integral, decimal, outputCharacters, parts;
    var digits, radices, bigRadices, decimals;
    var zeroCount;
    var i, p, d;
    var quotient, modulus;
 
 
    // currencyDigits = currencyDigits.replace(/,/g, ""); 
    currencyDigits = currencyDigits.toString().replace(/^0+/, ""); 
    //判断输入的数字是否大于定义的数值
    // if (Number(currencyDigits) > MAXIMUM_NUMBER) {
    //     alert("您输入的数字太大了");
    //     $("#Digits").focus();
    //     return;
    // }
     
    parts = currencyDigits.split(".");
    if (parts.length > 1) {
        integral = parts[0];
        decimal = parts[1];
        decimal = decimal.substr(0, 2);
    }
    else {
        integral = parts[0];
        decimal = "";
    }
    // 实例化字符大写人民币汉字对应的数字
    digits = new Array(CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE, CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE);
    radices = new Array("", CN_TEN, CN_HUNDRED, CN_THOUSAND);
    bigRadices = new Array("", CN_TEN_THOUSAND, CN_HUNDRED_MILLION);
    decimals = new Array(CN_TEN_CENT, CN_CENT);
    
    outputCharacters = "";
    //大于零处理逻辑
    if (Number(integral) > 0) {
        zeroCount = 0;
        for (i = 0; i < integral.length; i++) {
            p = integral.length - i - 1;
            d = integral.substr(i, 1);
            quotient = p / 4;
            modulus = p % 4;
            if (d == "0") {
                zeroCount++;
            }
            else {
                if (zeroCount > 0) {
                    outputCharacters += digits[0];
                }
                zeroCount = 0;
                outputCharacters += digits[Number(d)] + radices[modulus];
            }
            if (modulus == 0 && zeroCount < 4) {
                outputCharacters += bigRadices[quotient];
            }
        }
        outputCharacters += CN_DOLLAR;
    }
    // 包含小数部分处理逻辑
    if (decimal != "") {
        for (i = 0; i < decimal.length; i++) {
            d = decimal.substr(i, 1);
            if (d != "0") {
                outputCharacters += digits[Number(d)] + decimals[i];
            }
        }
    }
    //确认并返回最终的输出字符串
    if (outputCharacters == "") {
        outputCharacters = CN_ZERO + CN_DOLLAR;
    }
    if (decimal == "") {
        outputCharacters += CN_INTEGER;
    }
 
    // 
    // 返回数据，大写返回；  同时，对输入的数据必须是整数
    // $(obj).val(currencyDigits.replace(/[^0-9]/g,''));

    if (currencyDigits.toString() != "") {
        //获取人民币大写
        return outputCharacters;
    }else{
        return "";
    }
}